Runtime.getRuntime（）.exec（）環境不同於cmd env？

Question

我試着用我的代碼和運行時命令運行jar。jar通過RMI連接到另一個主機。它通過一個異常並退出。

但是，當我從CMD打開罐子，它工作正常。

該jar獲取5個參數。

代碼：

String runCommand = "java -jar WhiteboardStudent.jar " 
     + "192.168.0.3" + " " 
     + "2000" + " " 
     + "2001" + " " 
     + "test" + " 0" ; 
final Process proc = Runtime 
     .getRuntime() 
     .exec(runCommand,null,new File("util/")); 

命令提示符：

java -jar WhiteboardStudent.jar 192.168.0.3 2000 2001 test 0 

在拋出異常的代碼是在這裏：

Object proxy = registry.lookup("RWD"); 
Whiteboard whiteboard = (Whiteboard)proxy; 

我只是stumped.any想法？

拋出異常的函數：

Registry registry = LocateRegistry.getRegistry(
       hostname, Integer.parseInt(whiteboardPort) 
       ); 
String serviceName = "RemoteWhiteboard" + sessionID; 
Object proxy = registry.lookup(serviceName); 
Whiteboard whiteboard = (Whiteboard)proxy; 
int userid = whiteboard.userRegistry(userName, ""); 
Main mainFrame = new Main(sessions, sessionID, 
    whiteboard,userid,""); 

Answer 1

我的建議是嘗試的絕對路徑在你的代碼：

String runCommand = "java -jar /c/users/xxx/WhiteboardStudent.jar " 
    + "192.168.0.3" + " " 
    + "2000" + " " 
    + "2001" + " " 
    + "test" + " 0" ;